No experience with the kr tubes but I have gold lions and sohpia electric tubes the sohpia blue bottle kt88s are a step above the gold lions.
KR Audio KT88 Vacuum Tubes
Does anyone have experience with these power tubes? I understand they are well made and likely last longer than their Russia or Chinese counterparts. But, they are much more expensive. My real question has to do with the KR Tubes sound quality. Would you replace good sounding Gold Lion KT88s with the KR Audio tubes for a sound quality benefit? I've also read they make the similarly expensive EAT brand tubes that some prefer.